Micron P320h speed

ISRV

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Jul 11, 2015
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i've just turned on my new micron p320h 700gb



can someone explain this? what am i missing?
i was expecting 3200mb/s.

i've also tested the same way my other ssd's p3700 400 and 800gb - both were up to 2800mb/s as it should.

is there anything else that needs to be done with p320h to get full speed?
 

Patrick

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Dec 21, 2010
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You need higher queue depth. I use a lot of the 2.5" p320h's and they need QD128/ 256 to really hit their stride. You can still get low latency with lower QD but for sequential speeds, you need higher QD.
 

ISRV

Member
Jul 11, 2015
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so you say that 700mb/s is normal for this drives?
and i just can run 4 processes and they all will get about 700mb/s?

that is weird compared to p3700 for example, where single thread can get the whole 2800mb/s speed.
 

Patrick

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Dec 21, 2010
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so you say that 700mb/s is normal for this drives?
and i just can run 4 processes and they all will get about 700mb/s?

that is weird compared to p3700 for example, where single thread can get the whole 2800mb/s speed.
Use fio (Linux) or IOMeter (Windows) and run a 128KB sequential test with QD256.
 

ISRV

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Jul 11, 2015
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alright, thanks, will try that later.

now another question.
as i see SMART tools like smartctl doesn't detect this drive.

smartctl -i -A /dev/rssda
gives me:
/dev/rssda: Unable to detect device type

is there a way to check something like power on hours or how many bytes have been written already?
 

Patrick

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Dec 21, 2010
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I do not remember how to do this. But frankly, the p320h's have crazy write endurance. I think the 350GB model I use is like 25PBW.
 
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R.Zoli

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Sep 5, 2015
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alright, thanks, will try that later.

now another question.
as i see SMART tools like smartctl doesn't detect this drive.

smartctl -i -A /dev/rssda
gives me:
/dev/rssda: Unable to detect device type

is there a way to check something like power on hours or how many bytes have been written already?

With HDD sentinel you can check it easily. Or you can download micron's own utility (realssd manager) to these drives and this software you can make everything that's why I prefer micron's utility. I've got 3x 175 gb p320h and it's a fantastic drive, high speed, lowest latency what I ever saw from a drive. Only backward is the high power consumption.
 
Last edited:

R.Zoli

Member
Sep 5, 2015
52
3
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18
alright, thanks, will try that later.

now another question.
as i see SMART tools like smartctl doesn't detect this drive.

smartctl -i -A /dev/rssda
gives me:
/dev/rssda: Unable to detect device type

is there a way to check something like power on hours or how many bytes have been written already?
Under linux the sg3 utils neither detect the drive, because it's a special pci-e drive and not nvme.
 

Javik50k

Member
Oct 11, 2018
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Btw, can order p320h for a nice price. Would it fit into workstation? (Lga3647 dual xeon 6148s)? I mean, this old drive is a real beast with 32 channels slc and immortal endurance. Nice 4k perf numbers also. I have sm961 (960 pro). But this 34nm slc...simply looks tempting. (Optane would be the best choice but i don't have that much money for now). Maybe there are other nice options? (No consumer TLCs, please. I don't need hoax numbers for tiny slc cache. I want real thing...only other option is 970 pro for now. Or two 970 pros for vroc raid0.)